package com.example.dell1.sharepreferencestest_123jwq;

import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Switch;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private Button button;
    private EditText etname,etpass;
    private Switch sw;

    private String username="",password="";//用户名密码
    private SharedPreferences sp;//


    private View.OnClickListener listener=new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            switch (view.getId())
            {
                case R.id.btnlogin:
                    //登录按钮操作
                    username=etname.getText().toString();
                    password=etpass.getText().toString();
                    if (username.equals("123")&& password.equals("123"))
                    {
                        Toast.makeText(MainActivity.this, "登陆成功", Toast.LENGTH_SHORT).show();
                        if (sw.isChecked())
                        {
                            saveSP();//保存信息
                        }
                    }

                    break;
            }
        }
    };

    //保存Sharepreferences
    private void saveSP() {
        SharedPreferences.Editor editor=sp.edit();
        editor.putString("username",username);
        editor.putString("password",password);
        editor.putBoolean("remember",sw.isChecked());
        editor.commit();//提交保存
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        //获取sp对象
        sp=getSharedPreferences("login",MODE_PRIVATE);
        //读取存储信息
        readSP();
    }

    //读取简单存储信息
    private void readSP() {
        String name=sp.getString("username",null);
        String pass=sp.getString("password",null);
        Boolean b=sp.getBoolean("remember",false);
        if (b)
        {
            etname.setText(name);
            etpass.setText(pass);
            sw.setChecked(b);
        }
    }

    private void init() {
        button=(Button)findViewById(R.id.btnlogin);
        etname=(EditText)findViewById(R.id.editText);
        etpass=(EditText)findViewById(R.id.editText2);
        sw=(Switch) findViewById(R.id.switch1);
        button.setOnClickListener(listener);
    }
}
